Tandy 1000 Technical Reference Manual

Tandy 1000
Technical Reference Manual
1000 and IBM I/O Bus Cross Reference Chart (Continued)
Pin No.
B06
B26
B27
Signal Name
FOCOMARQ*
FOCOACK*
OMATC
Description
These signals are functionally the same as
those on the IBM PC, however, the Tandy
1000 was designed with
an FOC Controller
on the main logic board and the OMA Con-
troller
on the optional memory board. The
IBM PC has the OMA Controller on the
main logic board and the optional
FOC Con-
troller
on the I/O bus.
Note:
All other pins are identical to the IBM PC. See Section 3 for the
connector pin assignments.
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Tandy 1000 Specifications

General

Processor	Intel 8088
Processor Speed	4.77 MHz
RAM	128 KB (expandable to 640 KB)
Operating System	MS-DOS 2.11
Manufacturer	Tandy Corporation
Release Year	1984
Storage	Single or double 5.25" floppy disk drive (360 KB), optional hard drive
Sound	Tandy 3-voice sound
Ports	Parallel, Serial
Graphics	CGA (Color Graphics Adapter)
Graphics Modes	320x200, 640x200